Colin Patrick McCabe created HDFS-3947:
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Summary: If there are multiple edit logs with the same fstime,
Recovery Mode should load a different one than the normal loading process
Key: HDFS-3947
URL: https://issues.apache.org/jira/browse/HDFS-3947
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 1.2.0
Reporter: Colin Patrick McCabe
Assignee: Colin Patrick McCabe
Priority: Minor
If there are multiple edit logs with the same {{fstime}}, Recovery Mode should
load a different one than the normal loading process. This will protect
against many common kinds of corruption which affect only one edit log
directory. For example, most I/O errors would fall into this category.
This improvement is not necessary in branch-2 and later branches because in
those branches, we have edit log failover (See HDFS-3049). However, this is an
extremely simple and useful thing we can do to make Recovery Mode more helpful
in branch-1.
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